Shaker pan



A. GElST SHAKER PAN Feb. 13, 1940.

Filed Mardh'l7, 1939 3 Sheets-Sheet l Inventor A ttomeys Feb. 13, 1940. 5151 2,190,262

SHAKER PAN Filed March 17, 1939 '5 Sheets-Sheet 2 l q I r H F) Inventor ADOLF GE/s'r,

A tiomeys A. GEIST SHAKER PAN Feb. 13, 1940.

Filed March 17, 1939 3 Sheets-Sheet 3 Inventor A 0 0L F GE/S T,

A tiomeys Patented Feb. "13, 1940 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates? to improvements in shaker pans for threshing machines.

The principal object of the invention is to arate said grain from the chaff, feed the grain to 10 the rain pan and the chaff to the wind stacker.

To the accomplishment of the above, and subordinate objects presently appearing, a preferred embodiment of myinvention has been illustrated I in the accompanying drawings, set forth in de- 15 tail in the succeeding description, and defined in the claim appended hereto.

In said drawings:

Figure 1 is a view in top plan of my improved shaker pan in its preferred embodiment.

20 Figure 2 is a view in side elevation.

Figure 3 is a view in front elevation.

Figure 4 is a view in longitudinal section, partly broken away, and taken on the line 4-4 of Figure 1, and

25 Figure 5 is a view in transverse section taken on the line 5-5 of Figure 2 looking in the direction indicated by the arrows.

Referring to the drawings by numerals, the shaker pan of my invention includes a rectangu- 30 lar frame structure comprising a pair of side rails I connected together by a pair of front and rear end cross bars 2 and 3 and an intermediate cross bar 4 each suitably secured to the under edges of the side rails I. The rails 35 l and bars 2, 3, 4, are preferably formed of wood. The top edges of the side rails I preferably slant downwardly from the front to the rear of the frame thereby making the latter higher at the front end than at the rear.

40 Front and intermediate bars 2, 4 support a plate-like transversely corrugated section 5 of sheet metal having front and rear edges 6 and I set into and suitably secured to the tops of said bars and also having side flanges 8 set into 45 the inner sides of the side rails l. Corrugations of the section 5 are constructed to provide between said bars 2 and 4 ribs 9 on said section of acute angle form in cross section and having short vertical rear walls l and oblique webs 50 ll therebetween.

The rear and intermediate bars 3 and 4 support a plate-like sheet metal riddle, or screen, section l2 punched out to provide transversely extending rows of elongated rectangular aper- 55 tures l3 closely spaced in each row, the apertures in alternate rows being staggered relative to those in intermediate rows. The rows of apertures l3 may be said to be arranged in successive series there being seven series illustrated and designated from front to rear of the section A, B, C, D, E, F, G, the apertures being graduated in size as regards width in the series and extending lengthwise in some series transversely of said section and lengthwise longitudinally of the section in others and all of said apertures 10 being of the requisite length to permit the heads of the grain to fall therethrough. Preferably the apertures increase in size from the front end of said section 5 to a maximum size, as in series F, and then decrease in size. The de- 16 scribed arrangement and variation in size of the apertures l3 facilitates separation of the grain from the chaff and straw. The portions l4 punched from the section l2 to provide the apertures l3 are bent to extend downwardly and for- 20 wardly from the rear edges of said apertures, as best shown in Figure 4.

The described shaker pan is provided with front and rear pairs of hangers l5, l6, pivoted, as at H, to the side rails I and having upper bearing ends l8 whereby said hangers may be pivotally mounted, in any desired manner, in the usual threshing machine for oscillation endwise beneath the usual straw rack and by any suitable driving mechanism. Preferably the described shaker pan is of a length to extend beneath the major part of the straw rack.

In the operation of the described pan, the wheat and short straw and chaff, falls from the straw rack onto the section 5, the wheat kernels being fed under oscillation of the pan forwardly to the section II, whereas, the short straw and chaff are fed forwardly under such oscillation to the wind stacker. Thus the grain is separated primarily on the section 5 from the chafi and short straw. A second separating operation is effected on the section I2, under oscillation of the shaker, the grain falling through the apertures l3 and the apertures ii of smaller size functioning to sift and separate the grain and chaff, the latter being drawn by suction of the usua stacker into the latter.

Since threshing machines of the type embodying straw racks are well understood in the art, it has not been deemed essential to a clear understanding of the invention to illustrate the screen as applied to such a machine.

The foregoing will, it is believed, sufllce to impart a clear understanding of the invention without further explanation.

5 in other rows and all of suflicient length to permit the passage of the heads of the grain therethrough, said apertures being disposed lengthwise transversely of the frame in rows in some series and longitudinally of the frame in rows in other series to permit the heads lying crosswise and lengthwise of the section to pass therethrough, said rows being arranged to provide multiple rowzones or series having apertures therein staggered in the adjacent rows thereof,

increasing in width in successive zones through a plurality of zones from a point adjacent the front of the screen to a maximum in one zone, and decreasing in width toward the rear of the screen in successive zones from said zone of maximum size to facilitate separation of the chat! and straw.

ADOLF GEIBT. 

